Luigi Mangione's fingerprints, gun match evidence at scene of CEO killing, police say

Luigi Mangione, the suspect charged in the fatal shooting of UnitedHealthcare CEO Brian Thompson, has been linked to the scene of the crime through fingerprints and a gun police in Pennsylvania found during his arrest, police said Wednesday.

New York Police Commissioner Jessica Tisch said the department matched the gun to three shell casings discovered outside the Hilton hotel in midtown Manhattan where Thompson was shot and killed as he was walking to an investor's conference on Dec. 4.

Tisch also said the NYPD matched Mangione’s fingerprints to those found on a water bottle and a protein bar wrapper near the scene of the killing.

The breaks in the case come one day after Mangione's lawyer, Thomas Dickey, said his client intends to oppose extradition to New York and plead not guilty the charges filed against him, including a count of second-degree murder filed by prosecutors in Manhattan.

"We're going to fight this along the rules and with the constitutional protections that my client has," Dickey told reporters.

The attorney did not immediately respond to USA TODAY's request for comment.

Mangione was taken into custody Monday at a McDonald's restaurant in Altoona, Pennsylvania, after a customer recognized him based on photographs of the gunman distributed by NYPD. Police searched Mangione and found a pistol and a silencer, both made by a 3D printer, as well as "written admissions about the crime," according to a warrant obtained by USA TODAY.

After Mangione's arrest, police officials said investigators discovered three handwritten pages that speak to the alleged gunman's motivation. NYPD Chief of Detectives Joseph Kenny said they revealed "ill will toward corporate America." He did not elaborate.

Prosecutors in Manhattan filed multiple charges against the Ivy League graduate, including a count of second-degree murder, two counts of criminal possession of a weapon in the second degree, criminal possession of a forged instrument, and criminal possession of a weapon in the third degree.

(This story was updated to add new information.)

This article originally appeared on USA TODAY: Luigi Mangione linked to scene of CEO shooting by gun, fingerprints